Floaters as the First Manifestation of Chronic Myeloid Leukemia: A Case Report.

Chronic myeloid leukemia (CML) is a clonal myeloproliferative neoplasm arising in hematopoietic stem cells. It may initially present with ocular symptoms, as illustrated by the case of a previously healthy 25-year-old woman who presented with a five-day history of floaters in her left eye. Fundus examination revealed bilateral retinal hemorrhages, Roth spots, increased vascular tortuosity, a left preretinal hemorrhage, and a left vitreous hemorrhage. Retinopathy secondary to a hematologic disorder was considered; the patient was promptly referred to hematology-oncology. Laboratory evaluation demonstrated leukocytosis with anemia, peripheral smear showed 1% myeloblasts, 40% myelocytes, and basophilia. Cytogenetic analysis confirmed t(9;22)(q34;q11.2), and quantitative polymerase chain reaction (PCR) detected a BCR::ABL1 (b3a2) transcript. A diagnosis of bilateral leukemic retinopathy was established, and the patient promptly started appropriate therapy for CML. This case underscores the importance of recognizing ocular findings-such as Roth spots, intraocular hemorrhages, and increased vascular tortuosity-as potential indicators of systemic malignancy and ensuring early referral and management. Early ophthalmic recognition of such findings can be vision- and life-saving.